Open fuse: the low-voltage fuse on the control is blown.
Goodman E5 is an open fuse. The low-voltage fuse on the control is blown. It is not line voltage, so it is not H8 and not L8. Causes are the blown fuse itself and a short in the low-voltage wiring. Both steps are technician steps: check the fuse for continuity and replace it if it is open, then find the short and correct it. If there is no short, replace the board. A fuse opens for a reason, and a new fuse on a shorted low-voltage wire opens again, which is why the manual pairs those two steps. The code page notes that a blown fuse usually means a short somewhere in the low-voltage wiring.
Likely causes
- Blown fuse
- Short in the low-voltage wiring
Safe checks for E5
- Techniciancheck the fuse for continuity and replace it if open
- Techniciancheck the low-voltage wiring for a short and correct it; if there is no short, replace the board
Capacitors can hold a charge after the power is off. Safety terms.
When to call a pro
Call a licensed HVAC technician: a blown fuse usually means a short somewhere in the low-voltage wiring.
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Parts & tools for this fix
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Multimeter for appliance and HVAC diagnosis: guide
In this code: Short in the low-voltage wiring
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